Furnace-door



(No Model.) 5 Sheets-Sheet 1] H. LBEARUP.

mama DOOR. No. 303,257. Patented Aug. 12, 1884.

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H. I. BEARUP.

FURNACE DOOR;

No. 303,257. Patented Aug. 12, 1884.

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FURNACE DOOR.

No. 303,257. Patented Aug. 12, 1884..

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(No Model.) v 5 Sheets-Sheet 4.

' H. I. BEARUP.

FURNACE DOOR.

No. 303,257. Patented Aug. 12, 1884.

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NITIEIID STATES ArnNr Price.

HENRY I. EEARUP, OF ELKHART, INDIANA, ASSIGNOR OF ONE-HALF TO IVESLEY SMITH, OF

Fu'RNAo SPECIFICATION forming part of Letters Application filed December 213, 1883.

To all? whom it may concern.-

Be it known that I, HENRY I. BEARUP, a citizen of the United States, residing at Elkhart, in the county of Elkhart and State of Indiana, have invented certain new and useful Improvements in Furnace-Doors; and I. do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the artto which it appertains to make and use the same, reference being had to the aceompanyin g drawings, and to letters or figures of reference marked thereon, which form apart of this specification.

The object of my invention is to provide a furnacedoor for use on locomotives, boilers of marine engines, and in connection with furnaces of all descriptions, which can be easily and quickly opened and closed without req ni ring the fireman to use his hands, and which can, however, also be opened by hand; and my invention consists of a furnace-door which the fireman can open with his foot by stepping upon a lever, platform, or other suitable appliance, and which will close itself when the weight of the fireman is removed.

It further consists of a furnace-door, as hereinafter described, and also of mechanism for opening it, either by foot or hand, that is simple and cheap in its construction and operation, which occupies no more space when open than it does when it is closed, which will open,

and close with a short movement of the operating device and with a light pressure, and

which will admit as little cold air as possible to the furnace when open.

In the present case I show and describe an improved furnacedoor formed of two sectorshaped sections which are hung on a common devices may be devised without departing ADRI AN, MICHIGAN.

E-DOOR.

Patent No. 303,257, dated August 12, 1884-.

[No.modcl.)

from the main part of my invention, the essential feature of which is a furnace-door that can be opened by the fireman with his foot or hand, and which will automatically closeitself, and I therefore illustrate hereinafter one of the many modifications of my invention that may be devised.

In the accompanying drawings, Figure 1 is a front elevation of a furnace-door which embodies my invention, the door being closed. Fig. 2 is a similar view with the door open.

crating mechanism when closed. Fig. 4 is a vertical section through the door and doorop ening, (the operating mechanism being omitted,) showing the door attached to a cast iron frame instead of being attached directly to the furnace or boiler. Figs. 5 and 6 are side and front views, respectively, of a slightly-niodified door. Fig. 7 is a front elevation of a modification, showing adoor arranged to slide in guides instead of to swing from a pivot above; and Fig. 8 is a front view and vertical cross-section of the apron B.

The doors A A are preferably made double with outer plates of the shape shown in Figs. 1, 2, and 6, which are suspended from a common pivot, H, and with inner plates, at a, of the shape and size of the firedoor opening. Between the inner and outer plates there is an airspace to k cop them cool and prevent them from warping. When the inner plates are burned out, they can be easily replaced by new ones. I cover np'the upper port-ion of the door-opening with an apron-plate, B, which may be rigidly attached to the front of the furnace, a suliicient opening beingleft beneath it to, allow for shoveling in coal. The apron is hung on the pivot II and held in position by the bolt II, and by removing the latter bolt it can be swung to one side out of the way when it is desired to gain access to the interior of the fire-box. The lower edge of the apron'is an arc of a circle about the pivot II, and ithas the projecting flange b, which laps over the top edges of the inner door-plates, a, a, and forms a guide for the same, besides making a close joint.

The operating mechanism. consists of the links 0 O, pivoted each at one end, respectively,

Fig. 8 is a side elevation of the door and 0pto the two wings of the door; the connectinglink D, which connects the free ends of the links O G with the lever E the lever E fulcrumed on a hanger, S, attached to the furnace; and a rod, F, which connects the lever E with the crank of a rock-shaft, G, which shaft may be supported by bearings V on the front of the furnace, or which may be arranged on or be neath the floor or deck in front of the furnace. The rock-shaft G has a pedal, K, and it may also have an inclined foot-piece, M, one end of which rests on a double crank, m, of the rockshaft and the other on the floor or deck. A handle, N, is attached to the bolt-coupling, the rod F to the lever E for convenience in opening the doors by hand, and I may also add a hand-lever, L, at one end of the rock-shaft or at any convenient point. The lever E has an adjustable weight, 6, which counterbalances the weight of the door and the operating mechanism, the fireman adjusting it to the amount of pressure he desires to exert.

In Fig. at a castiron frame, I, is shown, which is bolted to the furnace, and which car ries the doors and apron instead of having them attached directly to the furnace or boiler.

The furnace-door illustrated in Figs. 5 and 6, and shown without the opening mechanism,

is the same as above described,with the exeepthat the apron B is omitted and the door covers the entire opening.

In the modification illustrated by Fig. 7, instead of suspending the two half-doors on a pivot, I arrange them so that .they slide be tween lower and upper guideways, R and T, which may be either inclined or curved. In this case the links 0 O are pivoted to a pair of bars, 0 O, which latter, are hung on the common pivot H, and a short pair of links, Q Q, are pivoted to the bottoms of the bars 0 O and to the doors A and A", respectively.

The operation of the mechanism described 'will be readily understood. when the fireman desires to feed the furnace, instead of being obliged to throw the door open with his hand and then take up his shovelful of coal, and after throwingit in shut the door, he only has to step 011 the pedal K or the inclined bar M, whichever is most convenient for him, if both are provided, and the doors swing apart, and, after throwing in his shovelful of coal they close of'themselves as soon as he removes his foot. The doors are open for so short a time that very little cold air has a chance to enter, and the apron B cuts off the current of cold air that ordinarily rushes in through the top of the furnace-door when open. In the (USE) of the sliding doors, the operation of the levers slides them apart up the inclined or curved guideways, and when the pressure is removed they gravitate back into a closed position.

It is not always necessary to provide both of the foot devices shown, or both of the hand devices, for opening the doors. One of the latter is, as a rule, sufficient, and if it is desired to have the doors held open for anylength of time for the purpose of checking the fire or otherwise, a suitable device may be provided that will hold the pedal or the handle down, or the doors may be held open by moving the weight out to the end of the lever E.

Having thus described my invention, what I cla' 'as new, is-

1. A furnace-door consisting of two sections,

a device which can be operated with the foot,

and suitable intermediate mechanism, whereby the two halves of the door move apart when a pressure is exerted upon the foot device and olose'together automatically when the pressure is removed, substantially as set forth.

2. The combination, with a furnace, of a door consisting of two self closing sections moving in a vertical plane, a lever, E, and togglelinks connecting .the lever with the door-sections, substantially as and for the purpose set forth.

3. The combination, with a furnace, of a door consisting of two self-closing sections moving in a vertical plane, each hung on a pivot, a lever, E, and toggle-links connecting the lever with the door-sections, substantially as and for the purpose set forth.

'4) A furnacedoor consisting of two sections, in combination with a weighted lever, and togglelinks connecting the lever with the door, a connecting-rod, and a rock-shaft and pedal or an equivalent foot-operating device,

substantially as and for the purpose set forth.

5. The combination, witha furnace and furnace-door, of an apron-plate, B, hung on a pivot above the door-opening, and adapted to be swung to one side in the same vertical plane, substantially as and for the purpose set forth.

6. The combination, with a furnace, of the 

